Pantographic milling mechanism.



F. H. RICHARDS.

PANTOGRAPHIC MILLING MECHANISM.

APYLIOATION FILED FEB.25, 1910. 1 1 17,245. Patented Nov. 17, 1914 11SHEETS-SHEET 1.

rm: NORRIS PETL'RS r0 PHOTO-LITHO WASNVNLTUN. '1 c F. H. RICHARDS.

PANTOGRAPHIG MILLING MECHANISM.

APPLICATION FILED FBB.25,1910.

1,1 1 7,245. Patented Nov. 17, 1914.

11 SHEETS SHEET 2.

V L lllli inn llll I" TH NORRIS PEYERS C0,PHO1U-LITHO..W'15HINGTUN. n

F. H. RICHARDS.

PANTOGRAPHIG MILLING MECHANISM.

APPLICATION FILED mums, 1910.

1 ,1 1 7,245, Patented Nov. 17, 1914.

11 SHEETSSHEET 3.

P. H. RICHARDS.

PANTOGRAPHIC MILLING MECHANISM.

APPLIGATIOH FILED PEB.25, 1910.

1 ,1 1 7,245. Patented Nov. 17, 1914.

11 SHEETSSHEET 5.

MR E as g cq I N i as m k. l R Q EN Q a '35 m Q 2% 5e 5 H k w t m w w 185 m g m E R 4 1 N A Wiinesaes: lnvenior:

n1: NORRIS PETERS CO. PHOTO-THO WASHINGTUN, D. C.

P. H. RICHARDS.

PANTOGRAPHIG MILLING MECHANISM.

APPLICATION TILED P3135, 1910. 1,1 17,245. Patented Nov. 17, 1914,

11 SHEETS-SHEET 6.

I. H. RICHARDS.

PANTOGRAPHIG MILLING MECHANISM.

APPLICATION FILED IEB.25, 1910.

1,1 17,245. Patented Nov. 17, 1914.

11 SHEETS-SHBET 'l.

nwlmiumn ullim F. H. RICHARDS.

PANTOGRAPHIO MILLING MECHANISM.

APPLICATION FILED M125, 1910.

1,1 17,245, Patented Nov. 17, 1914.

11 SHEETS-SHEET 8.

F. H. RICHARDS.

PANTOGRAPHIG MILLING MECHANISM.

nruonxou mum 11:12.25, 1910.

1 ,1 1 7,245, Patented Nov. 17, 1914 ll SHEETS-SHEET 9.

,xjj

P. H. RICHARDS. PAN'IOGRA GMILLI use! M.

' APPLIGA OH FILED R26, 19 1,1 17,245. Patented Nov. 17, 191i s 11gijTSSHEBT l0.

l Q l n [g] A T H h ;fg: Mr g g F. H. RICHARDS.

PANTOGBAPHIG MILLING MECHANISM.

APPLICATION FILED 11:12.25. 1910.

1,1 17,245. Patented Nov. 17, 19m

11 BHBETS SHEET 11.

THE NORRIS PEYERS-CQH PHbID'iH'HQ. WSHINGTUN. D. Cv

UNITED STATES PATENT OFFICE.

FRANCIS K. RICHARDS, 0F HARTFORD, CONNECTICUT, ASSIGNOR TO THE AMERICANTYPOGRAPHIC CORPORATION, OF NEI/V YORK, N. Y., A CORPORATION OF ARIZONA.

PANTOGRAPHIC MILLING MECHANISM.

Specification of Letters Patent.

Patented Nov. 17, 1914.

To all whom it may concern:

Be it known that I, FRANoIs H. RICHARDS, a citizen of the United States,residing in Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inPantographic Milling Mechanism, of which the following is aspecification.

This invention relates to mechanism for accurately effectingpantographic results.

The object of the invention is to provide reproducing mechanism in whichthe working tool of whatever nature this may be, as for instance amilling tool, is movable in each of three directions each transverse toeach of the others, and the ratio of which movements are capable ofbeing severally adjusted each independently of the others in respect ofthe pattern tracer. The movement of the tool relative to the patterntracer in a measured ratio will be efiected by mounting these membersupon a bed plate carried by a crane as a beam swinging about a fixedaxis. Movement in a transverse direction upon the same plane andmovement toward and from such plane will be effected in each instance bya lever train mounted upon and carried by the bed plate or swingingbeam. Some of the movements of the tracer in a straight line path resultin movements of the follower, which in the present illustration is aworking tool, in a. r-=traight line path, and are conveyed through anangularly movable part. Reciprocation in a straight line path isconverted into angular movement of an oscillatory member and thisangular movement is converted into reciprocation of the follower in astraight line path. The relative positions of the points of connectionbetween the angularly movable member and the tracer and the followereflcct movement in a measured ratio between the tracer and the follower."I he connections between the parts moving in a straight line path andthe angular mov able part have a sliding engagement in a directiontransversely of such straight line path of movement. The angularlymovable member in each instance transmits movemcnt in a straight linepath from one member to another. thereby neutralizing the crank motionerror.

This impro ement is particularly adapted for use in the manufacture ofmaster type and in forming hard metal dies and matrices particularlythose for use in the typographic art.

The tracer and the follower will both be mounted on the same side of theaxis of the beam for positive reproductions of the pattern. But bychanging the position of the work-holder and the tool carrier from oneside of the axis of the beam to the other side the product may bereversed end for end and side for side in respect of the pattern. If thepattern tracer and working tool are both upon the same side of the axisof the beam, and the working tool is nearer the axis than is the tracerthe product will be a miniature of the pattern. If the working tool andtracer are placed upon opposite sides of the axis of the beam theproduct will be a reversal from the pattern. The reproduction may thusbe either a positive miniature of the pattern or it may be a reversed ornegative miniature.

The device is termed pantographic not because its mechanism embodies aproper 'aintograph but because it performs the work which the pantographis intended to do but which the pantograph also fails to do accurately.

The drawings which accompany and form part of this specification aremade from a working mechanism embodying my invention.

Figure 1 of such drawings illustrates a front elevation of the machine.Fig. 2 is an end elevation of the machine looking at this from the righthand end of Fig. 1. Fig. 3 a front elevation of the beam and itsassociated parts detached from its carrying crane. Fig. -l is a top planview of the mechanism illustrated in Fig. 3. Fig. 5 is an end elevationof the left hand end of the beam and shows the pattern tracer and itscarriage. Fig. {l is a front elevation of the parts shown in Fig. thebeam and some of the other portions being broken away. Fig. 7 is ahorizontal section taken at about the plane of the line 77 of Fig. 6,illustrating the manner in which the lower portion of the pattern traceris mounted upon its carriage for vertical reciprocation. Fig. 9 is avertical cross section through the beam and associated levers on a planeat about the line 8-8 of Fig. 3, looking toward the left. Fig. 9 is avertical cross section taken on a plane at about the line 9-9 of Fig. 3,looking toward the left F ig. 10 is a front elevation, partly inlongitudinal section, of the tool spindle carriage, the tool spindle,and associated parts. Fig. 11 is an underside view of the tool spindlecarriage. Fig. 12 is a detail of a portion of the tool spindle carriageshown in a position at about the right angles to the position which thesame parts occupy in Fig. 10. Fig. 13 is a cross section taken on aplane at about the line l3-l3 of Fig. 3, looking toward the left, italso being in part a view from the right hand end of Fig. 10, andillustrating the connection between the rock shaft upon the tool spindlecarriage and the rock shaft upon the beam. Fig. 11 is an enlarged viewof the rock-shaft connecting mechanisms illustrated in Fig. 13 detachedfrom the carriage. Fig. 15 is a front elevation, partly in section, ofthe parts illustrated in Fig. 14, these being in the same positionswhich they occupy in Fig. 10. Fig. 16 illustrates the right hand end ofthe lever in Fig. 14: viewing this from the right hand side of suchfigure. Fig. 17 is a detail in cross section taken on a plane at aboutthe line l7 l7 of Fig. 15. Fig. 18 is a top plan view of the adjustablefulcrum carrier for the carriage connecting lever, this lever beingshown in horizontal cross section in this view. Fig. 19 is a verticalcross section taken on a plane at about the line 19 19 of Fig. 18, thelower portion of the beam being shown in dotted lines. Fig. 20 is adetail of one of the pivot carrying arms of the fulcrum member illustrated in Fig. 18. Fig. 21 is an enlarged horizontal section taken on aplane at about the line El -'21 of Fig. 3, it being taken through thelower left hand end of the tool spindle carriage. Fig. 22 is a verticalcross sectional view of the same parts taken on a plane at about theline QQ QiZ of Fig. 21. Fig. 23 is a vertical longitudinal view of adevice in the nature of a gib for adjusting the play of the tool-spindlecarriage upon the guide rail of the beam. Fig. Ell is a top plan view ofthe parts illustrated in Fig. Fig. 25 is a perspective view of the gibor bearing member detached. Fig. 26 is a cross section of the connectingbar between the pattern tracer carriage and the lever connecting thecarriages, and is taken at about the line 26-436 of Fig. I"). Fig 27 isa perspective view of such connecting bar. Fig. 28 an elevation partlyin lon itudinal section. of a belt carrying device. ig. 29 is a top planview thereof partly shown in horizontal section. Fig. 30 is a detailedview partly in longitudinal section of a pivot and pivot adjustment forthe crane which carries the bed plate beam. Fig. 31 is a perspectiveview of the pivot detached. Fig. is a top plan view of the partsillustrated in Fig. 30. Fig. 33 is a diagram illustrating the frontelevation of the beam and the lever connections between the patterntracer carriage and the tool spindle carriage, and corresponding to Fig.3. Fig. 34 is a plan view detail or diagram of the same parts andrelations, and corresponding to Fig. -'l-. Fig. is a diagramillustrating the movement of the tool spindle. Fig. 36 is a diagramillustrating the corresponding movement of the pattern tracer; and Fig.37 is a diagram illustrating the movement of the tool spindle incidentto a different adjustment from that for eifecting the movementillustrated in the diagram of Fig. 35.

As was stated in the preamblatory description, the object of the presentembodiment of this invention is to permit a pattern tracer to control aworking tool, in the formof a rotary miller and cause this to follow thepattern tracer in unison at a measured ratio in three directions eachdisposed at right angles to each of the others, and to alford means foradjusting the ratio of each movement independently of each of theothers, and for also permitting the same ratio of reduction orenlargement to be effected in each of the three directions of movement.

The pattern tracer, designated herein by 1, and the working tool,designated herein by 2, are carried by the bed plate 3 of the machine,and all the operative connections between such pattern tracer andworking tool are mounted upon such bed plate. The bed plate is in theform of a swinging beam. And to avoid confusing this member with somefixed part of the machine frame it will be hereinafter referred to asthe beam. The beam itself is provided with a pivotal support having afixed axis. It is mounted upon a crane l which is supported in pivotalbearings at 5 and 6, respectively carried by an arm 7 and by the mainportion of the fran'iing of the machine. The axes of the pivots 5 and 6are disposed in the present instance in a, vertical line. For con--venience of the present description it will be assumed that the axis ofthe crane and consequently the axis of the beam is in a verticalposition and that the beam is so secured to the crane that it will swingin a horizontal plane. Since the beam is really the bed plate of themachine and it and its associated parts neces arily must be heavy thebest results for accurate work will be secured when such axis vertical.The operator in such a construction will not have to overcome gravityeither in starting or stopping the motion of the beam or of the partswhich are mounted thereon to move upon ways transverse to such axis,which, of course. in the present illustration is horieontal.

In the end and cross sectional views of theb'eam it will be noted thatthis is provided With a pair of longitudinally disposed bores. These arefor convenience in manufacture and do not perform any material functionin the operation of the machine. They do. however, afford convenienthousings for the clamp members 9, which receive the screws for boltingthe beam to the crane. lVedges 10 are driven between shoulders on thecrane. and the top of the beam for precisionizing the position of thebeam into a horizontal position. Before passing from the description ofthe beam, or bed plate, itself, to the mechanisms mounted upon itattention is called to its formation. Its cross sectional formation isuniform from end to end. It is provided at its front side at top andbottom, see for instance, Fig. 5, with rails constituting guides orways, the top rail 11 is provided with a guide surface 12 at its frontand a guide surface 13 at its rear. The bottom rail 14 is pro vided witha guide surface 15 at its top, a guide surface 16 at its rear. a guidesurface 17 at its bottom. and a guide surface 18 at its front. The beamat its lower rear side is also provided with a guide rail 19.

The pattern tracer and the working tool are mounted upon their carriagesfor movement upon such carriages transversely of the beam. And thecarriages are mounted upon the beam for longitudinal movement thereon.The pattern tracer carriage 20 is mounted upon the rails or ways of thebeam for longitudinal movement thereon. The engagement with the lowerrail is such that fixed faces upon the carriage engage the top and frontfaces 15 and 18 of the rail and an adjustable gib or friction member 21engages the rear and bottom faces 16 and 17 of such bottom rail. A fixedface at the upper portion of the carriage engages the face 12 of theupper rail and an adjustable engaging member 22 engages the rear of theupper rail.

The upper portion of the carriage is pro -vided with a bearing 23 forreceiving the shaft or spindle portion 21 of. the pattern tracer. Thepattern tracer 1 is shown of conical formation and carried by a stem 25,which stem is mounted in a handle 26. The lower portion of the handlecarries the gib members 9.7 and 28 for running upon ways 29 and. 310atthe lower portion of the carriage, the ways and 210 being disposedparallel with the bore 8?. Such ways are adjacent to the connectionbetween the carriage and the bottom rail. It will thus be seen that themovement of the pattern tracer relative to the carriage upon which it ismounted is in a vertical direction transversely of the beam; that thebearing faces for preventing transverse play of the carriage upon theways engage the faces upon the top and bottom of the bottom rail; andthat such rail is also engaged upon its front and rear faces forpreventing play in an opposite transverse direction in a horizontal lineincident to the tracer moving the beam through its carriage. Thehorizontal play is also prevented by the engagement of the front andrear of the top rail. The weight of the carriage also it will be seenwill be borne by the lower rail thus lowering the location of the centerof gravity.

The tool spindle is mounted upon the tool spindle carriage 3 5. Thiscarriage is sup ported by the beam and is mounted upon the ways affordedby the rails 11 and 14 upon which the pattern tracer carriage is alsomounted. .i face 36 a; the rear of the top of the carriage 35 enga 'esthe front face 12 of the rail 11. A. clam 'iing member 3? is secured tothe carriage and engages the rear face 13 of su h rail 11 thus clampingthe front and back of such rail. This carriage. as does also thecarriage for the pattern tra er. engages the top rail at the front andrear; but does not engage the top and bottom of this rail. Faces fastwith the lower portions of the ca engage the faces 15 and 18 of thelower rail. A clamping member 38 is secured to the lower portion of thecarriage for cn'aging the rear face 16 of the lower rail. These bearingsurfaces just descri ed are at the portion of the carri at which thetool spindle housing is lccater. A. rail 3.) extends the entire lei,i'th of the lower portion of the carriage and has bear ng faces at eachend for engaging the top face 15 of the lower rail. The engaging portionadjacent the tool spin- (llo housing is of cons-:iderable extentlongitudinally of the rail upon which it bears and below its cc, rportion there is provided an adjust: le gib member. designated in Fig. 9by the reference character 40, and shown in detail in Figs. "28. and Theends of the bearing portion of the rail 39 and this adjustable siihconst tute as it were a three point bearing for preventing any renrlrncyof rormion of the spindle l'iousing portion of the carriage. it will beseen that both the carriages have a secure engagement with the top.bottom. front and rear of the lower rail and engagement with the frontand rear of the top rail.

ln Figs. 9 and 11 the lower portion of the right hand url of the toolspindle carriage is illu trated. and thi i provided with n qib orclampinrj nu-inbwr 5; for rnsragii'ig the rear face N1 of the lavitmnrail and with an adjustable gill "ll for engaging the lower face 17 ofsu h rail. Tlhis carriage, it will be seen has two widely separatedregions of contact with the lower rail. At each of these regions ofconta-i't all four sides of the rail are engaged. Thus it will be seenthat vibrations of the tool iiulepcnoentlv of the beam will beimpossible. T he adjusting member or gib 4:0 is shown as comprising acircular head and a stem 41. one side 42 of which stem has a plainconcave surface and the other side 4-3 of which has a concave surfaceprovided with screw threads. The lower portion of the carriage hasbearings provided for receiving the member 40 and its set screws 44-45.The screw 14 is seated in a tapped bore in the carriage and en gages atits end the rear of head 40 for forcing the same outwardly and intoengagement with the beam. The set screw to is mounted in a plain boreand engages the screw threads 4?, and bottoms in its bore for effectinga retraction or a locking movement of the member. This device isemployed for effecting accurate position of the tool spindle carriageupon the ways of the beam. Such carriage is somewhat of a leverformation and ordinary gibs would not afford the permanency of precisionwhich is essential, especially in a device where the ratio of reductionbetween the pattern and the product is large, as for instance, in thepresent construction, a reduction of twenty live to one is frequentlyeffected.

The working tool 2, in the present instance a rotary milling tool, iscarried by a chuck 50, carried by a tool spindle 51. A housing 52 isprovided upon the carriage and in the present illustration is shown asintegral therewith. The lower portion of the housing 52 has within it adownwardly directed or outwardly opening conical face in which conicalbearing member 54 is mounted, see Figs. 10, 21 and The conical bearingmember 54 is longitudinally split and is provided. with a bore orbearing face 55 for the lower portion of the spindle 51. T helongitudinal adjustment of the conical bearing member for varying thediameter of its bore 55, is effected by means of; a screw collar 56having screw threaded engagement with the upper end of the member 54-.and almtting against a suitably provided face within the housing 52.totation of the ring or collar 136 is el'l'ected by means of a worm 5Tengaging worm teeth in the perimeter of the ring or collar 56. One endof the worm provided with a head 58 which ei'igagcs an abutment andformed for the engagement of a screw driver. A nut 59 is mounted uponthe other end of the worm for locking the parts in their proper po itionof adjustment. The parts are further lo ked in l'iositimi by means of aset nut (50 upon. the lower end of the conical member By this means itwill be seen that ready and accurate adjustment of the bearing for thelower or worle ing end of the spindle may be effected.

The manner of reciprocating the tool spindle 51 upon its carriage, andin a path parallel with the axis of the crane will now be described. Thespindle is provided with a pulley 61 for rotating it. The spindle hasupon it an enlargement in the nature of a collar 62. WVithin the housing52 there is a sleeve 63 having an inturned end 64 engaging the lowerface of the collar 62. The lower portion of the sleeve 63 is interiorlyscrew threaded. \Vithin sleeve 63 and surrounding the spindle but freefrom engagement therewith is another sleeve 65 having at its lowerportion screw threaded engagement with the screw threaded interior ofthe sleeve 63. The sleeve 65 at its lower end engages the upper face ofthe collar (32. Suitable clamping means 66 is provided for clamping thesleeves and 63 together for preventing their movement one in respect tothe other, which movement will either loosen or tighten their engagementupon the collar 62. The spindle and its collar 62 will rotate within thesleeves 65 and 63. Such sleeves are for effecting a longitudinalreciprocation of the spindle. Suitable lubricant receiving packing 67may surround the spindle below the engaging portion 64:- And the sleeve65 may have a longitudinal slit in it for receiving similar packing 68.The connections for reciprocating the tool will be described in theproper place.

The movement in unison of the pattern tracer and tool toward and fromthe axis of the beam is effected by a lever train fulcrumed upon thebeam and connected to the carriages. The connecting lever 70 has itsfulcrum at its pivots 71. The fulcrum pivots are supported by a fulcrummember 72 mounted upon the lower rail 14: and the rail 19 (see Figs. 8,18 and 19). It will be seen that the fulcrum member has a face forengaging the top,bottom, front and rear faces of the bottom rail 14 ofthe beam, and faces for engaging the top and bottom of the rail 1.9. Thebody of the member 72 carries faces upon it for engaging the front andtop of the bottom rail. and carries an adjustable member 73 for engagingthe rear and bottom of such rail. The respective adj ustment for theseengagements being effected by screws 74 and The body portion alsocarries a face for engaging the rear of the ail 19 and an adjustablemember 76 for engaging the top of such rail, a. suitable set screw beingprovided for operating this part. By this means when the fulcrum memberis slid along the rail 14'. to its proper position it may be thereclamped and securely held. .F or the purpose of indexing the position ofthe fulcrum member an index pin 7 7 is provided which will entersuitably prepared notches or holes 77, which are arranged at intervalsalong the lower rail 14. Fig. 3. The fulcrum member is provided witharms 7879 at its front and rear, which carry the pivot pins 71determining the fulcral axis. Such pins are shown as engaging the frontand rear limbs of the lever 70. Such limbs are connected together bymeans of a shaft 80. The shaft 80 is shown as tubular for affordinggreat strength with a minimum amount of metal. The fulcrum pins 71 aremounted in smooth bores in the arms 7 879, the ends of the arms beingsplit into such bores and the bore clamped upon the pin by means of aset screw 81. The fulcrum pins 71 are illustrated, particularly in Fig.8, as seated in hardened bearing members 82 carried by the lever. Thebearing sockets of these members are at the same angle as are theconical ends of the pins.

The pattern tracer carriage is provided With a socket 85 for receivingthe connecting bar 86 connected to the lever 70. The longitudinalreciprocation of the carriage is translated into an oscillation of thelever by means of the connection. The connecting bar is shown asprovided with a longitudinally disposed groove 87 having tapering sides,see Figs. 26 and 27. The socket 85 is provided with a tapped boss 88 forreceiving a set screw 89. This screw is provided with a slotted conicalend for engaging a key member 90, which is seated partly in the untappedportion of the bore of the boss 88, and partly in the longitudinalgroove 87. When the set screw 89 is screwed against the key member 90Which is slotted, all the parts will be flexed together into a tensecondition of rigidity. This will hold the connecting bar rigid with thecarriage. It Will become practically a part thereof. To afford greatersecurity in movementthe outward end of the connecting bar has intimateconnection With the top rail 11 of the beam. A rear face 91 upon thetransversely projecting portion of the connecting bar engages the frontface 12 of the top rail 11. The top and rear face of such rail areengaged by an adjustable gib member 92 and the bottom face of such toprail is engaged by an adjustable gib member 93 so that this outward endof the connecting bar is caused to engage the rail of the beam at itstop, bottom, front, and rear.

The lever 70 carries at its upper end a pin 94 which is held in positionby the split end of the lever and set screw 9.3. buch pin has a conicalend which is seated in a similarly formed conical seat in a slide 96,which is mounted in the ways 97 in the transverse end of the connectingbar. The ways 97 are disposed in a vertical position and consequentlytransversely of the ways upon the beam and parallel with the axis ofoscillation thereof. In the present con struction the oscillationimparted to the lever 70 incident to the longitudinal trans verse of thecarriage upon the beam is constant and unadjustable. The adjustment ofthe ratio of movement between the tracer carriage and the tool spindlecarriage is effected by the connection between the latter carriage andthe lever 70. The lever 70 is provided with ways 98 disposed radially inrespect of the fulcrum 71 of such lever. A connecting member 99 isadjustably mounted in the ways 98 and is clamped in its variouspositions of adjustment by means of a set screw 100 which traverses aslot 101 in the lever. An index pin 101 for engaging suitable holesdetermines the position of slide 99. The end of the tool spindlecarriage which is toward the lever 70 and toward the pattern tracercarriage is provided with transverse ways 102, that is the ways aredisposed in a vertical position and trans versely of the rails on thebeam. The con necting member 99 carries a conical engaging portion 103which is seated in a similarly formed recess in a slide 104 mounted inthe ways 10.2. The center of the engag ing portion 103 is located nearerthe fulcrum 71 than is the center of the pin 94 which connects suchlever to the pattern tracer carriage. For this reason the movementimparted from the pattern tracer carriage to the work spindle carriagethrough the lever 70 will be a reduced movement. In the drawings theparts are set for making a positive reproduction and consequently theengaging members 9i and 103 are shown upon the same side of the fulcrum71 and the pattern tracer and working tool are also shown upon the sameside of the axis of the beam.

The connection between the carriages for constraining the tool spindlecarriage to move in unison with the pattern tracer carriage a re. ofcourse, for effecting movements toward and from the axis of the beam.The beam as it swings upon its axis effects one movement of the partsrelative to the other for producing a reduction of movement. The ratio,of course, in this instance being determined by placing the parts insuch a position that the lever 70 will assume a vertical position andadjusting the position of the parts so that the distance between theaxis of the bed plate or beam and the axis of the tool spindle will bein measured ratio to the distance between the axis of the tool spindleand the axis of the pattern tracer. If it is desired to have uniformreduct on of the pattern the connecting point 103 between the lever 70and the tool spindle carriage will be so adjusted that the movementbetween the carriages will be reduced upon a ratio similar to thateffected by the swinging of the beam. This gives a movement transverseto the movement effected bv the swinging of the beam upon its axis. Thethird movement is at right angles to each of these and is effected by amovement of the pattern tracer and the following movement of the toolspindle transversely of the beam. In the present instance the transversemovement of the tool following the transverse movement of the patterntracer, that is transverse in respect of the ways upon the beam, iseffected by an axial reciprocation of the tool spindle in a pathparallel with the axis of the beam. The movement in unison of thepattern tracer and the tool spindle in paths parallel with the axis ofthe beam is effective by a lever train fulcrumed on the beam andconnecting these members together. These members, the pattern tracer andthe tool spindle, are, as was before stated, each mounted upon itscarriage for movement transversely of the direction of the carriagemovement upon the ways of the beam.

A rock shaft, which constitutes a part of the lever train for effectingthe parallel movements above referred to, is mounted upon the top of thebeam and has its axis disposed parallel with the rails or ways carriedby the beam for supporting the carriages and other parts of themechanism. This rock shaft in the present instance comprises two members10% and 105 secured together to oscillate in unison upon the same aXis.For the purpose of securing rigidity in a relatively light structure therock shaft is made in two portions. The portion 101 of the rock shaft ismounted on pins carried by the standards 106, 107. The portion 105 ofthe rock shaft is mounted on pins carried by standards 107 and 108. Thestandard 107 is located at the juncture or the interruption in the rockshaft. These standards are securely mounted upon the beam. The rockshaft, in the present instance the portion 101-, carries an elongatedwrist member 109 which is supported at its respective ends by rock arms110 and 111 rigidly mounted upon the rock shaft. The wrist member 109 isfor effecting the connection between the pattern tracer and the rockshaft. The shaft or spindle portion 24- of the pattern tracer has fastupon it a member 112 provided with a pair of engaging faces locatedtransversely of the direction of re ciprocation of the shaft 24L whichsecurely en age the opposite sides of the wrist member 109. In thepresent illustration it will be seen that the lower jaw, as it were,113, of this engaging member is carried by a rather substantial part andthat the upper jaw 114 is made upon a separate piece which is secured inposition by means of the nut 115 upon the upper end of the spindle 24.

The member 112 is provided with a micrometer device 116 for engaging anadjustable fixed face 117 upon the frame of the pattern tracer carriagefor adjusting the normal downward movement of the pattern tracer andconsequently adjusting the limit of movement of the rock shaft in onedirection. The rock shaft carries a second elongated wrist member 118which is carried by arms 119-120 on the shaft member 105 and an arm 121upon the shaft member 104:. The arms 120 and 121 are at the abuttingends of the rock shaft members 10-1 and 105, and by means of theconnection between such arms and the arms 119 and the wrist pin member118 a rigid connection between portions of the rock shaft is affordedand a rigid connection between the wrist pins 109 and 118 is alsoafforded. The rock shaft and its associated arms and wrist pinsconstitute a lever, as it were, in the lever train between the patterntracer and the tool. The sleeve 63 has fast upon it a member 122 whichis provided with a guideway disposed transversely to the axis of thetool spindle 51, and which is also disposed transversely to the axis ofoscillation of the rock shaft mounted on top of the beam. Since the toolspindle carriage reciprocates during its working and such reciprocationis, when the ratio of reduction is great, a very small amount, theconnection between the wrist member 118 of the rock shaft and the toolspindle must be such that the reciprocation of the carriage will notinterfere with the axial movement of the tool spindle.

A counter rock shaft, as it were, is mounted upon the tool spindlecarriage and is disposed in parallelism with the rock shaft on top ofthe beam. The counter rock shaft is in its form somewhat in the natureof a housing 123 and has its pivotal contacts within it, it beingmounted upon a pivot member 124 which is provided with conical ends, oneof which is seated in a conical recess in the end 125 of the housing andthe other of which is seated in a conical recess in a detachable end 120of the housing. This structure gives accuracy and rigidity and permits afree oscillation of the rock shaft. The spindle or pin 121 is in thepresent instance made integral with a portion 127 which is in the natureof a tool slide mounted and clamped upon ways 128 upon the tool spindlecarriage, the clamping being effected by means of a screw 129. Thecounter rock shaft carries a rock arm 130 which has pivoted to it a link131 for engaging the wrist member 118. The link member is provided witha V-shaped recess 132 for engaging one side of the wrist member and withan adjustable point bearing 133 for engaging the opposite side. By thismeans the rock shaft upon the top of the beam oscillates the oscillation will be communicated to the counter rock shaft. The counter rockshaft carries an adjustable member 134 in the nature of a slide whichmay be slid in ways in the housing portion of the counter rock shaft andwill be clamped in its position of adjustment by means of a set screw135. The adjustable member 134 carries a conical engaging point 136which is seated in a slide 137 traversing the ways 122. By adjusting thepoint 136 in relation to the axis of the counter shaft the amplitude ofreciprocation of the tool spindle 51 will be varied.

It will be seen from the foregoing that the reciprocation of the patterntracer transversely of the ways or rails upon the beam and in adirection parallel with the axis of the beam, will, through means of thelever train above described, cause the tool to re ciprccate in aparallel path in unison in a measured ratio predetermined in theconstruction of the machine and adjusted by means of the adjustment ofthe slide 131. The relative horizontal planes of the tool and thepattern tracer will be ctlected by means of the micrometer stop 116.

To prevent the faces which engage the Wrist member 119 binding andpinching the pivot and twisting the various parts as the tool spindlecarriage is rcciprocated the rock arm 130 has fast with it an arm 138which carries a sector 139 struck from the center of the pivot 140 whichpivots the link 131 to such rock arm 130. The sector has en gaging facesupon its sides, one of which is in engagement with the link and theother of which is in engagement with a bearing member 111 carried by thelink. By means of this sector and its engagement, the link 131 is movedalong the wrist member by mains other than the pivot pin. The link 131at its pivoted end engaged between the arm member 138 and the rock arm130 for preventing relative movement between the parts other than themovement of the link about its axis. The member 122 carrying the waysfor the slide 137 is supported against oscillation means of adjut )leguide pins 112 clamped in arms 113 rigidly secured to the carriage.

The pattern supporting table for the eugagemont of the pattern tracer isinditated at 1 11- and is mounted upon the sl .e 145 mounted uponsuitable ways of the table (3 and the work holder 117 is mounted uponthe slide 118 mounted upon the same ways. The working position of theworking table may be regulated by means of a stop 119 and micrometer150.

The power in the present instance is sup plied by means of a motor 151mounted upon a vertically adjustable sli The vertical adjustment iseffected by means of a nut 153 and screw 15 t. The vertica adjustment ofthe motor is for the purpose of tightening the belts. The belt 135 fromthe motor will run over a set of fast and loose pulleys, designated in ageneral way by 156 on a countershaft 157.

An aria 158 is mounted upon an upright spindle 159 and car res a pairidler pulleys 160, 161. o er which the belt 1G2 passes from the pulley163 on the countershaft to the intermediate driving pulley 161 which ismounted on a bracket 165 fast on the spindle. In the present instancethe arm 158 is provided with clutching means where by the arm may beswung back into an idle position when the machine is not in use. An arm166 is pivoted to the bracket 165 and carries a pair of idler pulleys167 and 168 over which av belt 169 passes from the intermediate drivingpulley 161 to the pulley 61 on the tool spindle. The axis of the pivotof the arm 166 is parallel to and disposed quite near the axis ofrotation of the intermediate driving pulley 161 so that movement of theidler pulleys 167, 168 with such. arm toward and from the tool spindlein the limited movement about its axis will have very little effect uponloosening and tightening the belt. A strut member 170 is placed betweenthe end of the arm 166 and a portion of the carriage of the tool spindleso that as the carriage is reciprocated upon the ways of the beam theidler pulleys will move in unison therewith and the belt 167 will besubstantially at the same degree of tensencss in whatever position ofadjustment the tool spindle happens to be while it is in operation.

The pivot pin 5 for the bed crane -1- is an extension of a body portion177 which in a bore in the arm 7. The body portion at its upper end isprovided with a head 171 having a tapped hole 172 in which there ismounted an adjusting screw 173, engaging a face at the top of the arm.for adjusting the longitudinal position of the body portion 177-andconsequently of the pivot 5. The head is also provided with a smoothbore 171-. for receiving an adjusting screw 175 provided with a flangedhead resting upon the upper surface of the head 171. The arm 7 isprovided with a tapped socket 176 for receiving the screw 175. Thisscrew 175 effects the downward movement of the pivot :1, and the screw173 etlects the upward movement. The screws in conjunction lock thepivot in its proper position.

The diagram shown in Fi 33 illustrates the movements of the carriages 20and 35 longitudinally of the beam 3 and in a mcas plate carrying ratio.Movement of the tracer 1 and 1990i! carriage 720 from the full lineposiions to the dotted line positions will, through the connecting bar87 and the pivconnection 91, shift the lever 70 angu- 3 upon axis 71 ofits fulcrum sup- 72 from its full line position to its line position.And the angular mo ement of the lever 70 will be communicated throughthe pivotal connection 103 to the tool carriage 3? and tool 2 and movethose from their full line to their dotted line posi These movements arein the same direction toward and from the axial line of the beam. If itis desired, however, as was previously stated, to produce a reversal ornegative of the pattern the carriage 35 with the tool 2 will be movedinto the positions 35'", 2 upon the other side of the axial line, and inthis instance, although the resultant moven'ient of the toollongitudinally of the beam will be in the same direction as the movementof the pattern tracer, yet, as will be seen by the diagram in Fig. 3 t,which illustrates the lateral movement of the parts, the work producedwill. be negative or reversed. The pattern is illustrated at a. Theproduct for the first position above referred to is illustrated at bwhich is a reduction in size of the pattern. The product for the secondposition, wherein the product is reversed, is illustrated at 0. By meansof the arrows adjacent the positions a and b it will be seen that amovement of the pattern tracer 1 following the pattern a, and moving thebeam from its full line to its dotted line aosition, will move theworking tool 2, in producing the product Z), in the same direction. Butwhen the working tool 2 is upon the opposite side of the beam, as forinstance in the position 2, a movement of the pattern tracer 1 in thedirection of the arrow adjacent the pattern a will move the tool in thedirection of the arrow adjacent the representation of the product at 0.These two diagrams of Figs. 33 and 3t illustrate the movements forproducing the in a horizontal plane, the longitudinal and lateralmovements. The diagrams of Figs. 35, and 37 show the relative movementsfor producing depth of cut in. a measured ratio to the movement of thepattern tracer.

The full and dotted line positions in Fig. 35 show the relative amountof movement of the tool 2 which will be produced by the pattern tracermovement from the full to the dotted line positions indicated in Fig.36. An adjustment of the slide 13land consequently of the connectingmember or pin 130 in such a manner that the center of the pin 130 willbe at a greater distance from the center of the pivot 12d of the counterrock shaft in Fig. 3] than in Fig. will effect a greater tool movementfor the same amplitude of movement of the tracer.

Having described my invention I claim:

1. The combination with a bed plate, of a crane mounted to swing on oneaxis only, the bed plate being rigidly secured to the crane and prmidedwith ways vertical. to the said axis, a tracer carriage and a cuttingtool carriage mounted on the bed plate ways, lever mechanism connectingthe carriages, said lever mechanism being fulcrumed to the bed plate, atracer mounted on the tracer carriage for movement in a path parallelwith the said axis, a cutting tool mounted on the tool carriage formovement in a path parallel with the said mas, and lever mechanismconnecting the tracer and tool, the said lever mechanism being fulcrumedon the said bed'plate.

2. The combination with a frame, of a table mounted on the frame andcarrying a work holder and a pattern holder, a crane pivotally carriedby the frame and having its pivot connections at points above and belowthe table, a beam member in the na ture of a bed plate rigidly connectedto the crane, a pattern tracer and a working tool carried by the beam,and lever trains carried b y the beam for constraining the tracer andthe tool to reciprocate longitudinally and transversely of the beam inunison in a measured ratio.

The combination with a frame, of a table mounted on the frame andcarrying a work holder and a pattern holder, a crane pivotally carriedby the frame and having its pivot connections at points above and belowthe table, a beam member in the nature of a bed plate rigidly connectedto the frame, a pattern tracer and a working tool, said tracer and toolbeing mounted on the beam for reciprocation, the paths of reciprocationof said tracer and tool and the pivotal axis of the crane all lying inthe same plane, and connecting means mounted upon the beam andconnecting the tracer and tool holder for causing these to reciprocatein unison in a. measured ratio.

at. The combination with a frame, of a table mounted on the frame andcarrying a work holder and a pattern holder, a crane pivotally carriedby the frame and having its pivot connections at points above and belowthe table, a beam member in the na ture of a bed plate rigidly connectedto the crane, a pattern tracer and a working tool, said tracer and toolbeing mounted on the beam for reciprocation, the paths of reciprocationof said tracer and tool and the pivotal axis of the crane all lying inthe same plane, and an adjustable lever train mounted upon the beam andconnecting the tracer and tool holder for causing these to reciprocatein unison in a measured ratio.

5. The combination with a frame, of a crane pivoted to the frame at twoWidely spaced apart points, a table carried by the frame adjacent to oneof sail pivotal points and between the same, and a pattern tracer andworking tool mounted on the beam, and a pair of lever trains mounted onthe beam and connecting the tracer and tool for respectively causingthese to move in unison in a measured ratio toward and from said axisand in paths parallel thereto.

6. The combination with a frame, of a crane pivoted to the frame at twowidely spaced apart points, a table carried by the frame adjacent to oneof said pivotal points and between the same, a work holder and a patternholder carried by the table, a beam carried by the crane adjacent to theother of the said pivotal points and between the same. and a patterntracer and working tool mounted on the beam. and independentindependently adjustable lever trains mounted on the beam and connectingthe tracer and tool for respectively causing these to move in unison ina measured ratio toward and from said axis and in paths parallelthereto.

7. The combination with a frame. of a crane pivoted to the frame at twowidely spaced apart points. a table carried by the frame adjacent to oneof said pivotal points and between the same. a work holder and a patternholder carried by the table. a beam carried by the crane adjacent to theother of the said pivotal points and between the same. and a patterntracer and working tool mounted on the beam. and connecting meansmounted on the beam between the trace and tool for causing these to movein unison in a measured ratio toward and from said axis and in pathsparallel thereto.

8. In a machine having a framing portion. the combination with a tablesupported by the framing. of a work holder and a pattern holdersupported by the table. a crane. pivotal connections between the craneand framing located at positions above and below the table. a bam in thenature of a bed plate carried by the crane. the beam being provided withways transverse to the i-ivotal axis of the crane. a pattern tracer. atool spindle. a warriage mounted on the ways and supporting tne tracerfor movement in a path parallel with said axis, a carriage mounted onthe ways and supporting the tracer for movement in a path parallel withsaid axis. a carriage mounted on the ways and supporting the toolspindle for movement in a path parallel with the said axis. a rocltshaft mounted on the beam. )ll!l(t'il'.)ll; between the tracer and saidroclt shaft for rocking the same upon the reciprocation of the tracertransversely of the w ays. a rock shaft mounted on the tool spindlecarriage and disposed. in axial parallelwith the beam rock shaft.connections lr-ctwccn the rock shafts for causing these to rock inunison. connections between the tool spindle and rock shaft on the toolspindle carriage for reciprocating the tool spindle transversely of thesaid ways. and connections between said carriages for causing these toreciprocate in unison upon the ways.

The combination with a beam. means for pi. otallv supporting the beam,the beam being provided with an upper and a lower {:aide rail. of a pairof carriages mounted upon said guide rails. each of said carriagesclosely engaging the lower rail at the top. bottom. front and rear andengaging the upper rail at the front and rear, each car riage beingprovided with upper and lower bearings. a pattern tracer mounted on thebearings of one of the carriages and having its pattern engaging portionadjacent the lower rail. a tool spindle mounted on the bearings of theother of the carriages and having its tool carrying portion adjacent thelower rail. a lever between said carriages. a fulcrum member for saidlever c amped upon said lower rail, connecting means between eachcarriage and the said lever. a lever mounted upon the beam, andconnections between the tracer and the tool spindle respectively and thelast mentioned lever.

it). The combination with a beam, means for pivotally supporting thebeam. the beam being provided with an upper and a lower guide rail. of apair of carriages mounted upon said guide rails. each of said carriagesclosely engaging the lower rail at the top, bottom. front and rear andengaging the up per rail at the front and rear, each carriage beingprovided with upper and lower bearings. a pattern tracer mounted on thebearings of one of the carriages and having its pattern engaging portionadjacent the lower rail. a tool spindle mounted on the bearings of theother of the carriages" and having its tool carrying portion adjacentthe lower rail. a lever between said carriages. a fulcrum member forsaid lever clamped upon said lower rail. connecting means between eachcarriage and the said lever, a rock shaft disposed longitudinally of thebeam, a longitudinally disposed wrist carried by the rock shaft. jawscarried by the tracer and engaging the said wrist for rocking the shaftupon movement of the tracer, a rock shaft in axial parallelism with saidformer rock shaft. connecting means between said rock shafts to causethe same to oscillate in unison. an adjustable wrist carried by theparallel rock shaft, the spindle being provided with jaws for engagingsaid wrist.

11. The combination with a beam and means for supporting the same formove ment about a single axis. the beam being provided with waystransverse to its axis, a pattern tracer. a tool spindle, a carriagemounted on the ways and supporting the tracer for movement in a pathparallel with said axis. a carriage mounted on the ways and supportingthe tool spindle for movement in a path parallel with the said axis, arock shaft mounted on the beam. connections between the tracer and saidrock shaft for rocking the same upon the reciprocation of the tracertransversely of the beam, a rock shaft mounted on the tool spindlecarriage and disposed in axial parallelism with the beam rock shaft.linkage connecting the rock shafts. connections between the tool spindleand rock shaft on the tool spindle carriage, and connections betweensaid car-

